The poster reworks the Conservatives' "Labour isn't working" image of 1979 by depicting a huge queue outside a waiting room with the title: "The doctor can't see you now."

Shadow Health Secretary Andy Burnham said: "After five years of David Cameron, A&E waits are at their worst level for a decade and patients are finding it harder and harder to see a GP."

A Conservative spokesperson said: "A&E units across the UK faced unprecedented demand this winter, but English A&Es see 3,000 more patients a day within four hours than in 2009, and perform better than Scotland, Northern Ireland and Labour-run Wales, so it is completely wrong for Labour to try to turn this into a political football."